Re: New User - ImageJ use with Sea Surface Temperature Images

Posted by Gabriel Landini on Feb 11, 2010; 3:30pm
URL: http://imagej.273.s1.nabble.com/New-User-ImageJ-use-with-Sea-Surface-Temperature-Images-tp3689433p3689435.html

On Thursday 11 Feb 2010  15:25:11 you wrote:
> I have a similar situation but with other fluid: the atmosphere; and images
>  representing ozone concentrations, for example from this image:
>  http://www.nasa.gov/images/content/160657main_OZONE_large.jpg
>
> My question is, how can this conversion/recalibration be performed without
>  loosing information?
>
> Thanks a lot to everybody that shares their knowledge and time in this
>  list.

I would try to get the original data rather than reverse engineer from graphs.
One does not really know what type of processing the images have, and so the
quality of the data is unknown (as will be any conclusions one draws from
them).
The images above have - on top of the lut - some shading on one side of the
sphere.
And I would never use jpegs for this kind of job, since one has no control
over the compression artifacts.

Cheers,
G.